Odie OD/Clean boost?

[tubes]

I am helping a band mate build an ROG "Odie".  He wanted to put a clean boost in the same box. I know that you could get a an alright clean boost out of the odie as is but then you would need to adjust all your settings for an OD sound.  The first thing that came to mid was to switch one of the stages in/out.  This idea works great in tube architecture but I don't work enough with jfets to know how it will work in this pedal.  My first thought is to switch out the second stage and add another pot for the clean volume.  Anymore ideas or sugestions? 

kris

[squidsquad]

I'm no guru...but what I'd do:

Turn your drive pot down to where you're getting the *clean* you want...disconnect the pot & measure the resistance.  Now re-connect...find the amount of *drive* you want...disconnect & measure again.  Find 2 resistors of the values you need...choose between them with a foot or toggle switch.
(they replace the drive pot) Voila!  One less knob....two settings!

[tubes]

This Idea can work great.  I use a toggle switch on my fuzz face to raise the input impedence for that guit. vol. backed off sound on a switch. To do what we want here the output level increase would need to be taken in consideration aswell,  wich could all be done with a simple dpdt and some testing.  My idea though was to get two pedals with seperate controls in one box and on one board.  I am confident it will work I was just looking for a little back up or circuit ideas.  We start building tomorow I will post my findings.

kris

[LyleCaldwell]

I'm not familiar with that circuit, but I would think you could replace the current drive pot with two pots, with the second one switched in/out.

If the stock pot is a 250K, replace it with a 50K for the clean boost and a second 200K pot (put a resistor across the lugs of your current 250K pot to get 200K) that's switched in/out of the circuit.

Those values are just hypothetical - you'd have to choose the right values based on the actual circuit.  Depending on the circuit and how the "drive" is implemented you might want to put some pF value caps in parallel with the pots to prevent squeals.

[tubes]

I bread boarded the boost circuit and found that only using the first stage for the boost produced great resuslts.  I will need to experiment with  some caps to get the right tone for his guitar and amp but the gain boost was quite good.  My friend is almost done the stock pedal and we will start with the mods.  The nice thing about this project is we won't have to add anything to the board we can just use PTP from the pots, jacks and switches to add the clean boost switch.  I will post results and a schematic update if anybody else want's to try a mod like this.  It should work on any 2 or 3 trany circuit with a bit of bread board experimenting.

kris